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US4573477B1
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US4573477B1 - - Google Patents
Assignee: Hitachi Ltd
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Filing: 1983-04-21
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Granted: 1991-10-22
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Expires: 2003-04-21
Abstract
No abstract record available.
Inventors
- 👤 Namekawa Koroku
- 👤 Koyano Akira
- 👤 Kasai Chihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8979; G01S15/8988; A; A61; A61B; A61B8/00; A61B8/06; G01P; G01P5/00; G01P5/24; G01P5/241; G01P5/244; G01S15/02; G01S15/50; G01S15/58; G01S15/582; G01S15/8977
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |